reporter: the 46-year-old bronze star recipient who served in iraq of first diagnosed in august, 2013. following treatment, he was given a clean bill of health and returned to his work as delaware attorney general just months later. he announced last year that he would not seek a third term as attorney general. instead, planning a run for governor in 2016. please join me in welcoming my friend my father my hero the next vice president of the united states, joe biden. reporter: biden gave an emotional speech introducing his father at the 2008 democratic national convention and was considered a rising star in the democratic party. just this spring biden suffered a recurrence of the cancer and sought treatment. despite a valiant fight, beau biden died surrounding by his entire family. he s survived by his wife hally, and two children, vice president joe biden and jill biden, and his brother and sister. vice president biden released